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Topic: Diversity and unity among organisms 

Science

 Standard 7.  Understands biological evolution and the diversity of life
  Level I (Grade K-2)
   Benchmark 2.Knows that there are similarities and differences in the appearance and behavior of plants and animals
    Knowledge/skill statements
     1.Knows there are similarities in the appearance of plants
     2.Knows there are similarities in the appearance of animals
     3.Knows there are similarities in the behavior of plants
     4.Knows there are similarities in the behavior of animals
     5.Knows there are differences in the appearance of plants
     6.Knows there are differences in the appearance of animals
     7.Knows there are differences in the behavior of plants
     8.Knows there are differences in the behavior of animals
  Level II (Grade 3-5)
   Benchmark 1.Knows that fossils can be compared to one another and to living organisms to observe their similarities and differences
    Knowledge/skill statements
     1.Knows that fossils can be compared to living organisms of today to observe their similarities and differences
     2.Knows that fossils can be compared to one another to observe their similarities and differences
  Level III (Grade 6-8)
   Benchmark 4.Knows evidence that supports the idea that there is unity among organisms despite the fact that some species look very different (e.g., similarity of internal structures in different organisms, similarity of chemical processes in different organisms, evidence of common ancestry)
    Knowledge/skill statements
     1.Knows there is evidence of common ancestry among organisms
     2.Knows that different organisms have similar internal structures
     3.Knows that different organisms have similar chemical processes
  Level IV (Grade 9-12)
   Benchmark 3.Knows how variation of organisms within a species increases the chance of survival of the species, and how the great diversity of species on Earth increases the chance of survival of life in the event of major global changes
    Knowledge/skill statements
     1.Knows that the variation of organisms within a species increases the chance of survival of the species
     2.Knows how the diversity of species on Earth increases the chance of survival of life
   Benchmark 6.Knows how natural selection and its evolutionary consequences provide a scientific explanation for the diversity and unity of past and present life forms on Earth (e.g., recurring patterns of relationship exist throughout the fossil record; molecular similarities exist among the diverse species of living organisms; the millions of different species living today appear to be related by descent from common ancestors)
    Knowledge/skill statements
     1.Knows that natural selection provides a scientific explanation for the diversity of past life
     2.Knows that natural selection provides a scientific explanation for the diversity of present life
     3.Knows that natural selection provides a scientific explanation for the unity of past life
     4.Knows that natural selection provides a scientific explanation for the unity of present life
     5.Knows that recurring patterns of relationships exist throughout fossil records
     6.Knows that molecular similarities exist among diverse species
     7.Knows that millions of species today appear to be related by descent from common ancestors